The ring-opening reactions of propylene oxide and propylene sulfide with dibutylamine

b

te.

It2 x

-9,k&s-x)(b-x)+k,(a-x)(b-x)r.

(4)

10’

t&t-‘*-‘)

(*cl

k3 x 10’

(R-2.“1)

40

2.1

50

3.8

If

60

7.2

21

70

13.5

36

All4

13.2

7.8

-47.1

-60.9

17.2

13.1

-6b.2

-53.7

8.5

(Kcal/~l) ABC b.U.)

AB

+C

(XC~l/rJl) At+ (0.U.) l

RU

rxqomnxqw, tnithl

10/7wov~).).

&cm

of ?O urb OM ~8

I l.i?,MA

3.09 It, req.

c Cftod fra

rof.6.

b f 0.1.C.

Mh2Rac

-mdrti*rtimpunEtmfalhefcwtimdPsrithm

solvent

tsrp.= (*Cl

h-1'

In IMSD-Tolb

k2XlO'

k3XlO'

)12x10'

k3xlO'

(n-l,-+

(n-2.-1,

(u-1.-1)

(n-2,-1)

40

2.2

1.0

-

-

45

-

-

3.1

1.5

50

4.1

3.5

3.5

1.7

55

-

-

4.0

1.9

60

1.2

5.5

9.4

3.0

70

12.5

9.0

-

-

11.7

10.8

6.8

8.8

-51.7

-54.9

-51.0

-48.5

l

. E

mxl/mol) OS' (m.u.)

l

ra8p.

The initial concnm of PS and DM

are 1.49 and 3.46 W,

b cmSo/Tol - 10/7 (vol/vol). fha initial concn8 of

PS and DM

arm 1.47 and 3.09 n, ramp.

= f 0.l.C.

DMSO

E

cu80

(ut rr~ction)

wt fraction

k2x10-'

k3r10-'

(n-1,-1)

0(-1,-l)

CH$H-;H2 \/

0

2.38

0.080

4.20

1.0

1.0

0.146

6.08

2.0

6.2

0.10

7.17

3.0

0.265

9.19

5.6

m.29

0.869

l

??I9 inlthl

T?mw

of

lrtrapolatd

Of cum.

b

0.072

0.055

3.3

scbsrr I. ca. 1r10'

c..mo'

concn. of PB .ra 0.140 - 1.53 I(.

DM .r. frcr

z=o,s

30

0.190 - 3.65 M.

b

lbtbqhly

thr plot of E *.. wt. fract10n